# Tagged Questions

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### Smoothing noisy 2D wave using scatter plot data in the unit cell of a periodic system

Hello Signal Processing StackOverflow, I have noisy simulation data in three vectors that define the x, y, and amplitude values of a 2D waveform in a well-defined and precisely-known rectangular unit ...
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### 2D Procrustes transformation

I have 2 sets of point that belong to 2 different images. These points are defined as: $(x_i, y_i)_{_i=1,...,N}$ and $(x_i', y_i')_{_i=1,...,N}$ All these points are located on their corresponding ...
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### Deconvolution in Python in 2D

Referring to this topic, I am interested in a deconvolution using Python. However, unlike the linked topic above, I want to deconvolve a 2D image. The scipy.signal.deconvolve function unfortunately ...
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### Is the system $L\{f[m,n]\}= c[m,n] f[m,n]$ shift invariant?

$c[m,n]$ is the spatially varying gain. My prof says that its not shift invariant. However if we put $m=m-k$ and $n=n-l$ we get $c[m-k,n-l] f[m-k,n-l]$ which is how a shift invariant system should ...
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### 2D periodogram for anisotropic signals

Is it appropriate to use 2D periodogram to estimate PSD of a stationary 2D signal which is NOT isotropic (anisotropic)? By isotropic I mean dependence of covariance function only on the length of ...
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### Is a cubic Lagrange interpolation tensor product the same as bicubic interpolation?

I just implemented some interpolated texture sampling by sampling the 4x4 nearest pixels then doing Lagrange interpolation across the x axis to get four values to use Lagrange interpolation on across ...
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### Singularity Detection from 2D Wavelet Modulus Plot

I was wondering if I could get some tips/resources on how to pick out the singularity from my 2D Continuous Wavelet Transform Coefficient Plot (scalogram) using the Gaussian Derivative as the mother-...